It got one out of five stars for complaint handling between January and March, and two out for five for how easy it is for customers get in touch and the clarity of its bills.

HOW TO GET YOUR MONEY BACK FROM YOUR ENERGY PROVIDER

If you realise you are in credit to your energy supplier, you have the right to ask for this money back.

Often this will happen during the summer months if you pay by direct debit as you will be using less energy.

Energy companies will often tell you that as your bills will be higher in the winter it’s worth keeping the money in the account, but if you want to use if for something else, and you know you will still be able to meet the higher bills in the colder months, you need to call up and ask for a refund.

If it refuses, you can make an official complaint and then escalate the complaint to the Ombudsman if necessary.

The same applies if you’ve switched suppliers and you were in credit at the time. Your old supplier should automatically refund you the money but it’s always worth checking as sometimes this isn’t the case.